Product Description 1 set of remote control system includes receiver and transmitter Transmitter: 1 START key 1 STOP key 4 available command keys You could buy one transmitters and another standby at the same time(that will be more favorable) Power source of receiver: AC36V, AC110V, AC120V, AC220V, AC380V, AC/DC12V, AC/DC24V. We have various dimensions and voltages for receiver that you can choose from.:) Product Feature Tiny size & light weight, Anti-jamming, Anti- interfering, Firm and durable, Long natural life, Improving workshop safety, Long operation distance up to 100m, 300 installations in single area Product Specification/Models Model number:HS-6 Outer Size(excluding antenna):100×47×30mm Weight(excluding batteries):110g Power Supply:2×AAA batteries Operating Range:up to 100m LED:3 Frequency:422.4~438MHz Response Time:0.0001s Housing Material:PA66 Protection Degree:IP65 Operating and Storage Temperature:-30 Celsius degree~+80 Celsius degree Application Application area: Crane, Conveyer, CNC, Coal Digging Machinery, Generator Startup, Concrete Pump, Grab Bucket, Other Machinery. Other Information Technical data of HS series remote control system : Working distance:up to 100m; Working temperature: -30 Celsius degree ~+80 Celsius degree; Receiving sensitivity: 115dBm; Protection class: IP65; Non-repeating ID code up to 4.2 billions sets; Power source of transmitter: 2× AA/AAA batteries; Power source of receiver: AC36V, AC110V, AC120V, AC220V, AC380V, AC/DC12V, AC/DC24V; Dimension of transmitter (except antenna): HS-4/6: 100× 50× 30mm, HS-8/10: 160× 65× 40mm, HS-12/14/16: 240× 65× 40mm. Payment T/T Delivery 1 Week Origin China Minimum Order 1 carton Packaging Carton